Improved bench-vise



` UNITED STATES PATENT OFFICE.

HARRISON P. HOOD, OF LOWELL, MASSACHUSETTS.

IMPROVED BENCH-VISE.

To all whom it may concern:

Be it known that I, HARRISON P. HOOD, of Lowell, in the county of Middlesex and State of Massachusetts, have invented an Improved Bench-Vise; and I do hereby declare the same to be fully described in the following specilication, and represented in the accompanying drawings, ot which- Figure l is a top view, Fig. 2 a side eleva tion, and Fig. 3 a longitudinal section, of it.

In the said drawings, A and B are two jawcarriers, from which two jaws, a b,project, in manner as represented. One of thesejaw-carriers-viz., that marked A-is fitted to, and so as tov be capable ot' sliding longitudinally on, a bar, O. A screw, c, projects from the end of such bar and enters a screw-nut, d, so connected to the jaw-carrier as to be capable of being revolved therein, and when revolved to give motion to the jaw-carrier on and relatively to the bar O, in a manner to cause the jaw a to either approach toward or recede from the jaw l). A lever, c, goes transversely through the head of the nut, and serves to enable a person to revolvethe nut. v

The bar O slides freely through the other jaw-carrier, B, and has a long slot, g, made lengthwise in 'and vertically through it. It is also provided with a series of notches or teeth, as represented at h. A pawl, D, hinged to the jaw-carrier B, and arranged therewith in inanner as represented in the drawings, operates with either of thc notches of the series in which it may be placed, and therewith serves to engage the bar with the jaw-carrier.`

The foot t' of the jaw-carrier B is cylindrical, and rests on a cylindrical plate, E, provided with a series of holes, through which screws may be passed for fastening the plate to a bench. A spindle, F, passes up through the plate E, and has a head, k, at its lower end to rest in a socket, l, made in the plate. The said spindle goes up through the slot g and the carrier B, and is jointed toa cam-lever, G,

arranged on the upper part of the carrier in manner as exhibited in Figs. 1, 2, and 3. By turning the lever down into a horizontal position its cam l will clamp the carrier to its seatinner faces of the jaws,such plates being l bent around the jaws so as to project into the notches.

In revolving bench-vises as heretofore made the clam ping mechanisms for tixing the rotary jawcarrier in position have been arranged so as to extend, either in whole or in part, below the bench for receiving or supporting the vise. Consequently it has beenmore or less`inconvenient of access for being put in operation. My arrangement of the clamping-lever relatively to the jaw-,carrier and the spreader is a much better one, as by means otl it the lever is not only in plain sight, but is more accessible. The said lever is provided with one or more projections or stops, o o, which extend from it or are arranged in manner as shown yin Figs, 2 and 3. They determine the extent ot' depression of the lever, arresting it at such a position as lwill allow ot' the pawl being raised above the teeth ofthe bar when the jaw-carrier is clamped to the supporting-plate. On raising the pawl ont of the rack or series of teeth the bar C may be easily moved lengthwisein the jaw-carrier B, so as to quickly move the jaw a either toward or away from the jaw b, the clamping of the jaws 0n an article placed between them being effected by turning the screw-nut on the screw.

I claim- In the said improved bench-vise asv made with the jaw-carriers A B applied to the bar O, as set forth, the arrangement of the clamplever on the jaw-carrier B, substantially as specified, the spindle being jointed to the said lever, and extended upward through the bar O and jaw-carrier, as explained.

' HARRISON P. HOOD.

Witnesses:

R. H. EDDY, G. H. WAsHBUEN. 

